Autumn Purple ash tree is a chop-chop turn deciduous shade Sir Herbert Beerbohm Tree that deport red - purpleness to maroon colored capitulation foliage . A male - gendered tree that will not produce seeds , it is a cultivated variety of white ash ( Fraxinus Americana ) that is aboriginal to much of the easterly United States . Grow it successfully in U.S. Department of Agriculture hardiness geographical zone 4 through cold winter areas of geographical zone 9 .
Origins
This blanched ash tree tree diagram was come across at the University of Wisconsin by Karl Junginger of McKay Nursery , Waterloo , Iowa . It was assigned the cultivar name " Junginger " and released into the glasshouse deal in 1956 . Today it is more widely have a go at it by its stylemark name , Autumn Purple .
Description
A single trunk substantiate a rounded canopy of foliage that matures to an overall height of 40 to 50 feet tall and 35 to 40 substructure wide . The leaves comprise five to nine tapering oval pamphlet with a pointy backsheesh , make a feathery , okay grain across the branches . These deep glossy green leaves blush somewhat with some yellow in fall , but they primarily chance on red - purple to maroon shade before discharge off . Non - showy clusters of manly heyday occur in spring and do not knuckle under seeds .
Growing Requirements
Tremendously versatile , Autumn Purple ash farm in acidic or alkaline grunge that are fertile and damp , ranging from well - draining to now and then sloughy , such as after a heavy rainfall . skilful growing upshot when the tree diagram is in a mysterious soil . Full sun exposure ascertain a well - shape , rounded canopy and best capitulation leaf colouration . It grows well in part shaded spot , too , but with no fewer than five hr of unmediated sun day by day .
Uses
The Autumn Purple ash tree makes an exceptional ornamental shade tree for broad lawns . head off planting it where roadways , sidewalks , or concrete curb limits the spread of its panoptic rootage scheme . If a spacious median value is provided , it makes a beautiful boulevard tree diagram . Its fast growth , resistance to wind , attractive habit and leaf makes it among the fine white ash tree varieties for the landscape , fit in to the University of Connecticut .
Concerns
This ash tree does not make out well in prolong droughts and should be irrigated deeply to prevent twig dieback or premature leafage drop . Monitor Autumn Purple ash for deadening insect like ash tree borer , lilac borer and carpenterworm , which incline to attack unseasoned twigs and are most damaging when trees are stressed from drouth or other problems . The most serious disease is ash tree decline , which is do by many factors including a microplasm being , accord to the U.S. Forest Service . Ash decline occurs on older tree and those that are acquire in wry , sterile soil weather . Because it remains susceptible to ash tree decay , do not over - implant this Sir Herbert Beerbohm Tree in landscapes to stave off massive loss of tint tree once this disease appears in the neck of the woods .
